import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/Login.vue'
import Home from './components/Home.vue'
import Welcome from './components/Welcome.vue'
import Users from './components/User/Users.vue'

Vue.use(Router)
const router = new Router({
    routes: [
        { path: '/', redirect: '/login' },
        { path: '/login', component: Login },
        {
          path: '/home',
          component: Home,
          redirect: '/welcome',
          children: [
              { path: '/welcome', component: Welcome },
              { path: '/users', component: Users }
          ]
        }
    ]
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
    // to将要访问的路径
    // from 代表从哪个路径跳转而来
    // next 是一个函数 表示放行, next()放行,next('/login')
    if (to.path === '/login') return next()
    // 获取token
    const tokenStr = window.sessionStorage.getItem('token')
    if (!tokenStr) return next('/login')
    next()
})

export default router
